550mm

The size stated above refers to width. Use drop-down menu to select depth.

Connections A and B refer to the connection methods to be used on either end of the bend. Doby frames or slip joints are standard connections for duct assembly. Sheet metal flanges are not a general connection method but can be useful when connecting to other ventilation equipment.

Although selectable on all sizes - and possibly necessary on your particular installation - we do not recommend slip joints for general duct assembly on ducts over 400mm in any one dimension.

These ducts are all made to order, so if you wish to make minor changes to the sizes, please use the 'other info' box below.